Media type: E-Article Title: Animal Life in Fresh Water: A Guide to Fresh-Water Vertebrates Contributor: Walford, L. A.; Mellanby, Helen imprint: JSTOR, 1939 Published in: Copeia Language: Not determined DOI: 10.2307/1436832 ISSN: 0045-8511 Keywords: Animal Science and Zoology ; Aquatic Science ; Ecology, Evolution, Behavior and Systematics Origination: Footnote: